GO:0072166 posterior mesonephric tubule development: Embryonic Kidney Tubule Formation, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0072166 describes the progression of the posterior mesonephric tubule from initial formation to mature epithelial tube within the mesonephros.
• The mesonephros is a transient embryonic kidney that forms through parallel waves of inductive signaling and mesenchyme maturation.
• Posterior mesonephric tubules are epithelial tubes that connect to the Wolffian duct and contribute to urogenital structures including the rete testis.
• Hox genes, particularly Hoxd11, specify regional identity within the intermediate mesoderm and influence mesonephric tubule development.
• JAGGED1-Notch signaling is active during human mesonephric development and its disruption causes Alagille syndrome, which includes renal anomalies.
• Comparative studies in primates show that mesonephric tubule development is conserved but timing differs between male and female embryos.
Description
The posterior mesonephric tubule is a transient epithelial structure that forms during embryonic development as part of the mesonephros, an intermediate kidney that functions before the definitive metanephric kidney arises. The Gene Ontology term GO:0072166, posterior mesonephric tubule development, captures the progression of this tubule from its initial formation to its mature structure. Understanding this process is essential because mesonephric tubules serve as a developmental template for later nephric structures and contribute to urogenital organs including the rete testis and efferent ducts. Disruptions in mesonephric tubule development are linked to congenital anomalies of the kidney and urinary tract, as well as syndromes such as Alagille syndrome that affect multiple organ systems. Researchers study posterior mesonephric tubule development to uncover the molecular signals that pattern the intermediate mesoderm and drive epithelial tube morphogenesis. The process involves coordinated inductive interactions between the mesonephric duct and surrounding mesenchyme, with signaling pathways such as Notch and Hox gene networks playing critical roles. Because the mesonephros is evolutionarily conserved across vertebrates, model organisms including chick, mouse, and non-human primates provide complementary insights into human development. This article synthesizes current knowledge on the genes, mechanisms, and experimental approaches used to investigate posterior mesonephric tubule development, with a focus on how CRISPR-based models can accelerate discovery in this field.
posterior mesonephric tubule development At A Glance
| GO ID | GO:0072166 |
|---|---|
| GO term | posterior mesonephric tubule development |
| Ontology | biological_process |
| Synonym | none |
| Major function | Formation and maturation of epithelial tubules in the posterior mesonephros |
| Anatomical context | Mesonephros, an embryonic kidney structure |
| Developmental timing | Embryonic; precedes metanephric kidney formation |
| Key signaling pathways | Notch, Hox gene networks, inductive mesenchymal-epithelial interactions |
| Related structures | Wolffian duct, rete testis, efferent ducts |
What Is GO:0072166?
GO:0072166, posterior mesonephric tubule development, is defined as the progression of the posterior mesonephric tubule over time, from its initial formation to the mature structure. The posterior mesonephric tubule is an epithelial tube that is part of the mesonephros, a transient embryonic kidney. This biological process encompasses the cellular and molecular events that lead to a functional tubule capable of connecting to the Wolffian duct and contributing to urogenital development.
Why Is posterior mesonephric tubule development Important in Cell Biology?
Posterior mesonephric tubule development is critical because the mesonephros serves as a transient kidney and a source of cells and signals that pattern the definitive urogenital system. Defects in this process can lead to congenital anomalies of the kidney and urinary tract, as well as broader developmental syndromes such as Alagille syndrome, which is caused by mutations in JAGGED1 and affects multiple organs including the kidney. Understanding the molecular regulation of mesonephric tubule formation provides insights into fundamental mechanisms of epithelial tube morphogenesis and organogenesis that are conserved across vertebrates.
• Provides a developmental template for understanding nephron formation in the metanephric kidney.
• Contributes to the formation of male reproductive structures including the rete testis and efferent ducts.
• Disruption of JAGGED1-Notch signaling during mesonephric development is linked to Alagille syndrome, which includes renal anomalies.
• Hox gene mutations, such as Hoxd11, alter mesonephric and metanephric kidney development in mouse models.
• Comparative studies in primates reveal conserved and divergent features of urogenital development.
• Serves as a model for studying epithelial tube morphogenesis and mesenchymal-epithelial induction.
• Relevant to regenerative medicine approaches aimed at rebuilding kidney tissue.
• Informs understanding of congenital anomalies of the kidney and urinary tract (CAKUT).
• Provides a basis for studying how transient embryonic organs influence adult organ function.
• Offers a system to investigate how signaling waves coordinate differentiation across a tissue.
What Happens During posterior mesonephric tubule development?
Inductive signaling and mesenchyme maturation
In simple terms: The mesonephros forms through waves of signals that tell surrounding cells to mature and become tubules.
In the chick mesonephros, parallel waves of inductive signaling and mesenchyme maturation regulate the differentiation of mesonephric tubules. These waves ensure that tubule formation proceeds in an organized spatial and temporal pattern, with signals from the mesonephric duct inducing nearby mesenchyme to undergo epithelialization. This process is critical for establishing the correct number and arrangement of posterior mesonephric tubules.
Epithelialization and tubule formation
In simple terms: Mesenchymal cells condense and transform into epithelial tubes that will become the mesonephric tubules.
The posterior mesonephric tubule arises from mesenchymal cells that undergo epithelialization to form an epithelial tube. This tube then elongates and connects to the Wolffian duct, establishing a continuous urogenital system. The formation of the rete testis, which connects the testis to the mesonephric tubules, depends on proper development of these posterior mesonephric tubules.
Regional specification by Hox genes
In simple terms: Hox genes act like address labels that tell cells where they are along the body axis and what kidney structures to form.
Hoxd11 specifies a program of metanephric kidney development within the intermediate mesoderm of the mouse embryo. While Hoxd11 primarily affects the metanephros, its expression domain overlaps with the mesonephric region, and Hox gene networks are known to pattern the intermediate mesoderm that gives rise to mesonephric tubules. Disruption of Hoxd11 leads to altered kidney development, highlighting the importance of regional specification in posterior mesonephric tubule formation.
Notch signaling and human relevance
In simple terms: Notch signaling is a cell-to-cell communication system that helps decide which cells become tubules, and when it goes wrong it causes a human syndrome.
JAGGED1 gene expression during human embryogenesis elucidates the wide phenotypic spectrum of Alagille syndrome. JAGGED1 is a ligand for Notch receptors, and its expression in the developing mesonephros suggests a role in mesonephric tubule development. Alagille syndrome, caused by JAGGED1 mutations, includes renal anomalies, linking Notch signaling to posterior mesonephric tubule development in humans.
Comparative development in primates
In simple terms: Studies in monkeys show that the timing of testis and ovary development relative to the mesonephros differs between species.
A comparative study of the development of the fetal testis and ovary in the monkey (Macaca fascicularis) revealed that mesonephric tubule development and gonadal differentiation are closely coordinated. This work highlights evolutionary conservation of mesonephric structures and provides a primate model for understanding human urogenital development.
Key Genes Involved in GO:0072166 posterior mesonephric tubule development
The following genes and proteins have been implicated in posterior mesonephric tubule development based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| Hoxd11 | Specifies metanephric kidney program in intermediate mesoderm | Mouse knockout models show altered kidney development |
| JAGGED1 | Notch ligand; expressed during human embryogenesis | Mutations cause Alagille syndrome with renal anomalies |
| Notch receptors | Mediate cell-cell signaling in tubule formation | Downstream of JAGGED1 in mesonephric development |
| Wnt9b | Secreted signal in intermediate mesoderm | Not directly cited in provided references; omit specific claim |
| Pax2 | Transcription factor in intermediate mesoderm | Not directly cited in provided references; omit specific claim |
| Pax8 | Transcription factor in intermediate mesoderm | Not directly cited in provided references; omit specific claim |
| Lhx1 | Lim homeodomain transcription factor | Not directly cited in provided references; omit specific claim |
| Osr1 | Odd-skipped related transcription factor | Not directly cited in provided references; omit specific claim |
| Wt1 | Wilms tumor suppressor; urogenital development | Not directly cited in provided references; omit specific claim |
| Sall1 | Spalt-like transcription factor | Not directly cited in provided references; omit specific claim |
| Gdnf | Glial cell line-derived neurotrophic factor | Not directly cited in provided references; omit specific claim |
| Ret | Receptor tyrosine kinase for GDNF | Not directly cited in provided references; omit specific claim |
| Bmp4 | Bone morphogenetic protein 4 | Not directly cited in provided references; omit specific claim |
| Fgf8 | Fibroblast growth factor 8 | Not directly cited in provided references; omit specific claim |
| Six1 | Sine oculis homeobox homolog 1 | Not directly cited in provided references; omit specific claim |
| Eya1 | Eyes absent homolog 1 | Not directly cited in provided references; omit specific claim |
| Hoxa11 | Paralog of Hoxd11 | Not directly cited in provided references; omit specific claim |
How Is posterior mesonephric tubule development Regulated?
Posterior mesonephric tubule development is regulated by inductive signaling between the mesonephric duct and surrounding mesenchyme, with parallel waves of signaling coordinating differentiation. Hox genes, including Hoxd11, provide regional identity to the intermediate mesoderm and influence the developmental program. Notch signaling, activated by JAGGED1, is also involved in human mesonephric development and its dysregulation leads to Alagille syndrome. The timing and coordination of these signals are critical for proper tubule formation.
posterior mesonephric tubule development and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| JAGGED1 | Alagille syndrome with renal anomalies | Knockout or point mutation in human cell lines or mouse models |
| Hoxd11 | Kidney developmental defects | Mouse knockout models |
| Notch pathway genes | Alagille syndrome spectrum | Knock-in of patient mutations in cell lines |
| Rete testis development genes | Male reproductive tract anomalies | Mouse knockout or knock-in models |
| Mesonephric tubule genes | CAKUT | CRISPR knockout in zebrafish or mouse |
Alagille syndrome and renal anomalies
Alagille syndrome is an autosomal dominant disorder caused by mutations in JAGGED1, which encodes a Notch ligand. JAGGED1 expression during human embryogenesis is observed in the mesonephros, and renal anomalies are part of the syndrome's phenotypic spectrum. This links posterior mesonephric tubule development to a human disease with multi-organ involvement.
Congenital anomalies of the kidney and urinary tract (CAKUT)
Disruptions in the molecular programs that govern mesonephric tubule development can lead to congenital anomalies of the kidney and urinary tract. While specific gene mutations are not detailed in the provided references, the importance of Hox genes in kidney development is well established. Hoxd11 mutant mice exhibit altered metanephric development, suggesting that related pathways may contribute to CAKUT.
Disorders of male reproductive development
The posterior mesonephric tubules contribute to the rete testis, which connects the testis to the efferent ducts. Defects in mesonephric tubule formation can therefore impact male fertility. Studies in mice have elucidated the formation of the rete testis during embryonic development, highlighting the developmental link between the mesonephros and the male reproductive tract.
From posterior mesonephric tubule development-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does a candidate gene regulate posterior mesonephric tubule formation? | Knockout in mouse or chick embryos |
| Does a specific point mutation in JAGGED1 cause renal anomalies? | Point mutation knock-in in human cell lines or mouse |
| How does a gene affect tubule epithelialization? | Overexpression or tagged knock-in in cell culture |
| What is the role of Hoxd11 in mesonephric regionalization? | Knockout and lineage tracing in mouse |
| How does Notch signaling coordinate tubule development? | Conditional knockout of Notch components in mouse |
| What are the evolutionary differences in mesonephric development? | Comparative studies in chick, mouse, and primate embryos |
How to Study the posterior mesonephric tubule development Process
| Method | What It Measures | Typical Application |
|---|---|---|
| In situ hybridization | mRNA expression patterns | Visualize gene expression in embryonic mesonephros |
| Immunofluorescence | Protein localization | Detect JAGGED1 or Hoxd11 in tissue sections |
| Confocal microscopy | 3D structure of tubules | Track epithelial tube formation |
| CRISPR knockout | Gene function loss | Test candidate genes in cell lines or mice |
| Lineage tracing | Cell fate mapping | Follow mesonephric cells during development |
| RNA sequencing | Global gene expression | Identify pathways active during tubule development |
| Comparative embryology | Evolutionary conservation | Study chick, mouse, and primate embryos |
Embryonic tissue analysis and imaging
Studying posterior mesonephric tubule development requires visualizing embryonic tissues. Techniques such as whole-mount in situ hybridization, immunofluorescence, and confocal microscopy allow researchers to track tubule formation and gene expression patterns in real time. These methods have been used to demonstrate JAGGED1 expression in human mesonephros and to visualize parallel waves of signaling in chick mesonephros.
Genetic lineage tracing and knockout models
Mouse and chick models are invaluable for understanding gene function in mesonephric tubule development. Knockout of Hoxd11 in mice revealed its role in metanephric kidney development, and similar approaches can be applied to study posterior mesonephric tubules. Lineage tracing using Cre-lox systems allows researchers to follow the fate of mesonephric cells.
Transcriptomic and proteomic profiling
RNA sequencing and proteomics can identify genes and proteins differentially expressed during mesonephric tubule development. While not directly cited in the provided references, these approaches are standard in developmental biology and can complement genetic studies. Comparative transcriptomics across species can reveal conserved and divergent pathways.
CRISPR-based functional genomics
CRISPR-Cas9 genome editing enables precise knockout, knock-in, and point mutations in candidate genes. This technology can be applied to cell lines and animal models to test the function of genes implicated in posterior mesonephric tubule development, such as JAGGED1 and Hoxd11.
How CRISPR Can Be Used to Study GO:0072166 posterior mesonephric tubule development
Knockout
CRISPR knockout can be used to delete candidate genes such as Hoxd11 or JAGGED1 in cell lines or animal models to assess their requirement for posterior mesonephric tubule development. For example, Hoxd11 knockout mice exhibit kidney defects, demonstrating the power of this approach.
Point Mutation
Point mutations identified in patients with Alagille syndrome can be introduced into JAGGED1 using CRISPR base editing or homology-directed repair to study their functional impact on mesonephric tubule development. This allows researchers to dissect the specific effects of missense mutations.
Knock-in
Knock-in of reporter genes or epitope tags into endogenous loci enables visualization and biochemical analysis of proteins involved in mesonephric tubule development. For instance, tagging JAGGED1 with GFP would allow live imaging of its expression in the developing mesonephros.
Overexpression
Overexpression of genes such as Hoxd11 or JAGGED1 using CRISPR activation or transgenic approaches can test whether increased dosage alters mesonephric tubule formation. This is particularly relevant for understanding gain-of-function mechanisms in disease.
How EDITGENE Supports posterior mesonephric tubule development Research
Researchers studying posterior mesonephric tubule development-related genes often need to determine whether a candidate gene is causally involved in tubule formation or maturation. EDITGENE provides a comprehensive suite of CRISPR-based services to accelerate this discovery process, from knockout to precise point mutations and overexpression models.
Contact EDITGENE today to design your custom CRISPR model for posterior mesonephric tubule development research.
Frequently Asked Questions About posterior mesonephric tubule development
What is GO:0072166?
GO:0072166 is the Gene Ontology term for posterior mesonephric tubule development, defined as the progression of the posterior mesonephric tubule from initial formation to mature structure.
What is the posterior mesonephric tubule?
The posterior mesonephric tubule is an epithelial tube that is part of the mesonephros, a transient embryonic kidney.
What genes are involved in posterior mesonephric tubule development?
Genes such as Hoxd11 and JAGGED1 have been implicated in mesonephric and kidney development.
What signaling pathways regulate posterior mesonephric tubule development?
Inductive signaling waves and Notch signaling via JAGGED1 are key regulators.
How is posterior mesonephric tubule development studied?
Researchers use embryonic tissue imaging, genetic knockout models, and CRISPR-based editing.
What diseases are associated with defects in posterior mesonephric tubule development?
Alagille syndrome, caused by JAGGED1 mutations, includes renal anomalies linked to mesonephric development.
What is the role of Hoxd11 in kidney development?
Hoxd11 specifies a program of metanephric kidney development within the intermediate mesoderm.
How does JAGGED1 relate to Alagille syndrome?
JAGGED1 mutations cause Alagille syndrome, and its expression in the mesonephros suggests a role in tubule development.
What model organisms are used to study mesonephric tubule development?
Chick, mouse, and non-human primate embryos are commonly used.
Can CRISPR be used to study posterior mesonephric tubule development?
Yes, CRISPR knockout, knock-in, and point mutation models can test gene function in this process.
Conclusion
Posterior mesonephric tubule development (GO:0072166) is a fundamental embryonic process that shapes the transient mesonephros and influences later urogenital structures. Key genes such as Hoxd11 and JAGGED1, along with signaling pathways like Notch, have been implicated in this process. Understanding its regulation provides insights into congenital anomalies and informs regenerative approaches. EDITGENE offers a full range of CRISPR services to help researchers dissect the genetic basis of posterior mesonephric tubule development.
References
- 1. Soueid-Baumgarten S et al.. 2014. Parallel waves of inductive signaling and mesenchyme maturation regulate differentiation of the chick mesonephros.. Dev Biol 385(1):122-35 PMID: 24091141
- 2. Kulibin AY et al.. 2020. Formation of the rete testis during mouse embryonic development.. Dev Dyn 249(12):1486-1499 PMID: 32852840
- 3. Mugford JW et al.. 2008. Hoxd11 specifies a program of metanephric kidney development within the intermediate mesoderm of the mouse embryo.. Dev Biol 319(2):396-405 PMID: 18485340
- 4. Fouquet JP et al.. 1980. A comparative study of the development of the fetal testis and ovary in the monkey (Macaca fascicularis).. Reprod Nutr Dev (1980) 20(5A):1439-59 PMID: 7349493
- 5. Crosnier C et al.. 2000. JAGGED1 gene expression during human embryogenesis elucidates the wide phenotypic spectrum of Alagille syndrome.. Hepatology 32(3):574-81 PMID: 10960452
